diff --git a/packages/mosaic/src/features/user-profile/__tests__/user-profile-security-panel.view.test.tsx b/packages/mosaic/src/features/user-profile/__tests__/user-profile-security-panel.view.test.tsx
index c0c7b3ab75b..2eabf8a18dd 100644
--- a/packages/mosaic/src/features/user-profile/__tests__/user-profile-security-panel.view.test.tsx
+++ b/packages/mosaic/src/features/user-profile/__tests__/user-profile-security-panel.view.test.tsx
@@ -70,7 +70,7 @@ describe('UserProfileSecurityPanelView', () => {
     expect(screen.getByRole('group', { name: 'Passkeys' })).toBeInTheDocument();
     expect(screen.getByRole('group', { name: '2-step verification' })).toBeInTheDocument();
     expect(screen.getByText('This device')).toBeInTheDocument();
-    expect(screen.getByText('2 other devices')).toBeInTheDocument();
+    expect(screen.getByText('Clerk App on macOS')).toBeInTheDocument();
     expect(
       screen.getByText('Permanently delete this account and all its data. This cannot be undone.'),
     ).toBeInTheDocument();
@@ -131,8 +131,7 @@ describe('UserProfileSecurityPanelView', () => {
     await user.click(within(screen.getByRole('alertdialog')).getByRole('button', { name: 'Remove', exact: true }));
     await waitFor(() => expect(screen.queryByRole('alertdialog')).not.toBeInTheDocument());
 
-    const otherDevices = screen.getByRole('group', { name: 'Other devices' });
-    await user.click(within(otherDevices).getByRole('button', { name: 'Manage Safari on iOS' }));
+    await user.click(screen.getByRole('button', { name: 'Manage Safari on iOS' }));
     await user.click(screen.getByRole('menuitem', { name: 'Sign out' }));
     await user.click(within(screen.getByRole('alertdialog')).getByRole('button', { name: 'Sign out' }));
     await waitFor(() => expect(screen.queryByRole('alertdialog')).not.toBeInTheDocument());
diff --git a/packages/mosaic/src/features/user-profile/user-profile-active-devices-section.view.tsx b/packages/mosaic/src/features/user-profile/user-profile-active-devices-section.view.tsx
index 1be9f5b1369..70d1c50b48c 100644
--- a/packages/mosaic/src/features/user-profile/user-profile-active-devices-section.view.tsx
+++ b/packages/mosaic/src/features/user-profile/user-profile-active-devices-section.view.tsx
@@ -73,9 +73,9 @@ export function UserProfileActiveDevicesSectionView({
     }
   };
 
-  // Confirming takes the whole card with it, trigger included — hence the dialog mounted outside
-  // it, and the current device as the place focus lands. Cancelling keeps the trigger, so focus
-  // goes back to it.
+  // Confirming takes the trigger with the other devices — hence the dialog mounted outside it, and
+  // the current device as the place focus lands. Cancelling keeps the trigger, so focus goes back
+  // to it.
   const focusAfterSignOutAll = () => {
     const signedOut = signedOutAll.current;
     signedOutAll.current = false;
@@ -86,7 +86,20 @@ export function UserProfileActiveDevicesSectionView({
     <div {...stylex.props(styles.sectionCards)}>
       <Section.Root>
         <Section.Group>
-          <Section.Title>{m.title}</Section.Title>
+          <div {...stylex.props(styles.titleRow)}>
+            <Section.Title>{m.title}</Section.Title>
+            {onSignOutAllOtherDevices && otherDevices.length > 0 ? (
+              <Button
+                ref={signOutAllTrigger}
+                color='neutral'
+                size='sm'
+                variant='ghost'
+                onClick={() => setIsSignOutAllOpen(true)}
+              >
+                {m.signOutAll}
+              </Button>
+            ) : null}
+          </div>
           <Section.Surface>
             {currentDevices.length > 0 ? (
               currentDevices.map(device => (
@@ -107,50 +120,18 @@ export function UserProfileActiveDevicesSectionView({
                 </Section.Item>
               </Section.Row>
             )}
+            {otherDevices.map(device => (
+              <Section.Row key={device.id}>
+                <DeviceItem
+                  device={device}
+                  triggerRef={removalFocus.registerTrigger(device.id)}
+                  onSignOut={openSignOut}
+                  onViewDetails={device => deviceDetails.open(device)}
+                />
+              </Section.Row>
+            ))}
           </Section.Surface>
         </Section.Group>
-        {otherDevices.length > 0 ? (
-          <Section.Group
-            variant='contained'
-            aria-label={m.otherDevicesTitle}
-          >
-            <Section.Surface>
-              <Section.Header>
-                <Section.Content>
-                  <Section.Label>
-                    {fill(otherDevices.length === 1 ? m.otherDevice : m.otherDevices, {
-                      count: String(otherDevices.length),
-                    })}
-                  </Section.Label>
-                </Section.Content>
-                {onSignOutAllOtherDevices ? (
-                  <Section.Actions>
-                    <Button
-                      ref={signOutAllTrigger}
-                      color='neutral'
-                      size='sm'
-                      variant='outline'
-                      onClick={() => setIsSignOutAllOpen(true)}
-                    >
-                      {m.signOutAll}
-                    </Button>
-                  </Section.Actions>
-                ) : null}
-              </Section.Header>
-              <Section.Items>
-                {otherDevices.map(device => (
-                  <DeviceItem
-                    key={device.id}
-                    device={device}
-                    triggerRef={removalFocus.registerTrigger(device.id)}
-                    onSignOut={openSignOut}
-                    onViewDetails={device => deviceDetails.open(device)}
-                  />
-                ))}
-              </Section.Items>
-            </Section.Surface>
-          </Section.Group>
-        ) : null}
       </Section.Root>
       {onSignOutAllOtherDevices ? (
         <Confirmation
diff --git a/packages/mosaic/src/features/user-profile/user-profile-active-devices.messages.ts b/packages/mosaic/src/features/user-profile/user-profile-active-devices.messages.ts
index 7d525a5f3d2..ed29beef3b4 100644
--- a/packages/mosaic/src/features/user-profile/user-profile-active-devices.messages.ts
+++ b/packages/mosaic/src/features/user-profile/user-profile-active-devices.messages.ts
@@ -1,9 +1,6 @@
 export const userProfileActiveDevicesMessages = {
   title: 'Active devices',
-  otherDevicesTitle: 'Other devices',
   emptyCurrent: 'No current device available',
-  otherDevice: '{count} other device',
-  otherDevices: '{count} other devices',
   signOutAll: 'Sign out of all devices',
   signOutAllError: 'Something went wrong signing these devices out. Please try again.',
   signOutAllDialog: {
diff --git a/packages/mosaic/src/features/user-profile/user-profile-password-section/user-profile-password-row.view.tsx b/packages/mosaic/src/features/user-profile/user-profile-password-section/user-profile-password-row.view.tsx
index 5a3c8d234b3..7c2b0a13e6f 100644
--- a/packages/mosaic/src/features/user-profile/user-profile-password-section/user-profile-password-row.view.tsx
+++ b/packages/mosaic/src/features/user-profile/user-profile-password-section/user-profile-password-row.view.tsx
@@ -22,27 +22,33 @@ export function UserProfilePasswordRowView({
 }: Omit<UserProfilePasswordSectionViewProps, 'sectionTitle'>) {
   const m = useMessages('userProfilePasswordSection');
   return (
-    <Section.Row>
-      <Section.Item>
+    <>
+      <Section.Header>
         <Section.Content>
           <Section.Label>{m.label}</Section.Label>
-          <Section.Description>{hasPassword ? m.masked : m.noPasswordSet}</Section.Description>
         </Section.Content>
-        {managedBy ? (
-          <Section.Actions>
-            <ManagedByLabel {...managedBy} />
-          </Section.Actions>
-        ) : onSubmitPassword ? (
-          <Section.Actions>
-            <EditPassword
-              hasPassword={hasPassword}
-              requiresCurrentPassword={requiresCurrentPassword}
-              onSubmit={onSubmitPassword}
-            />
-          </Section.Actions>
-        ) : null}
-      </Section.Item>
-    </Section.Row>
+      </Section.Header>
+      <Section.Items>
+        <Section.Item>
+          <Section.Content>
+            <Section.Description>{hasPassword ? m.masked : m.noPasswordSet}</Section.Description>
+          </Section.Content>
+          {managedBy ? (
+            <Section.Actions>
+              <ManagedByLabel {...managedBy} />
+            </Section.Actions>
+          ) : onSubmitPassword ? (
+            <Section.Actions>
+              <EditPassword
+                hasPassword={hasPassword}
+                requiresCurrentPassword={requiresCurrentPassword}
+                onSubmit={onSubmitPassword}
+              />
+            </Section.Actions>
+          ) : null}
+        </Section.Item>
+      </Section.Items>
+    </>
   );
 }
 
diff --git a/packages/mosaic/src/features/user-profile/user-profile-password-section/user-profile-password-section.view.tsx b/packages/mosaic/src/features/user-profile/user-profile-password-section/user-profile-password-section.view.tsx
index f0c0099cc4a..eb411405887 100644
--- a/packages/mosaic/src/features/user-profile/user-profile-password-section/user-profile-password-section.view.tsx
+++ b/packages/mosaic/src/features/user-profile/user-profile-password-section/user-profile-password-section.view.tsx
@@ -25,7 +25,10 @@ export function UserProfilePasswordSectionView({
   }
 
   const group = (
-    <Section.Group aria-label={asGroup && !title ? m.label : undefined}>
+    <Section.Group
+      variant={asGroup ? 'contained' : 'default'}
+      aria-label={asGroup ? m.label : undefined}
+    >
       {title ? <Section.Title>{title}</Section.Title> : null}
       <Section.Surface>
         <UserProfilePasswordRowView
diff --git a/packages/mosaic/src/features/user-profile/user-profile-security-panel.styles.ts b/packages/mosaic/src/features/user-profile/user-profile-security-panel.styles.ts
index ab7f24daae3..4df375a3176 100644
--- a/packages/mosaic/src/features/user-profile/user-profile-security-panel.styles.ts
+++ b/packages/mosaic/src/features/user-profile/user-profile-security-panel.styles.ts
@@ -22,6 +22,12 @@ export const styles = stylex.create({
     borderWidth: '1px',
     backgroundColor: colorVars['--cl-color-background-subtle'],
   },
+  titleRow: {
+    alignItems: 'center',
+    columnGap: space['3'],
+    display: 'flex',
+    justifyContent: 'space-between',
+  },
   sectionCards: {
     gap: space['3'],
     display: 'flex',
diff --git a/packages/swingset/src/stories/user-profile.mdx b/packages/swingset/src/stories/user-profile.mdx
index 5fd35d80134..beae8a55ce7 100644
--- a/packages/swingset/src/stories/user-profile.mdx
+++ b/packages/swingset/src/stories/user-profile.mdx
@@ -28,3 +28,13 @@ and animates the popup; the profile paints it, names it, and carries the dismiss
   name='Overlay'
   storyModule={Stories}
 />
+
+## Flat contained groups
+
+Every contained group restyled flat from external CSS, using the same selectors as the Section
+`FlatContainedGroups` example.
+
+<Story
+  name='FlatContainedGroups'
+  storyModule={Stories}
+/>
diff --git a/packages/swingset/src/stories/user-profile.stories.tsx b/packages/swingset/src/stories/user-profile.stories.tsx
index 04a8034c036..8ed0b330b12 100644
--- a/packages/swingset/src/stories/user-profile.stories.tsx
+++ b/packages/swingset/src/stories/user-profile.stories.tsx
@@ -53,3 +53,90 @@ export function Overlay() {
     </Dialog.Root>
   );
 }
+
+export function FlatContainedGroups() {
+  const { activePage, setActivePage, pages } = useUserProfileFixture();
+  return (
+    <>
+      <style>{`
+        @scope {
+          :scope {
+            --section-stack-gap: 1.5rem;
+          }
+          .cl-user-profile-security-panel .cl-section:first-child > .cl-section-group:first-child > .cl-section-title {
+            position: absolute !important;
+            width: 1px !important;
+            height: 1px !important;
+            margin: -1px !important;
+            padding: 0 !important;
+            overflow: hidden !important;
+            clip-path: inset(50%) !important;
+            white-space: nowrap !important;
+            border: 0 !important;
+          }
+          .cl-section,
+          :has(> .cl-section, > div > .cl-section):not([class*='-panel']) {
+            gap: var(--section-stack-gap) !important;
+          }
+          .cl-section-group:not([data-variant='contained']),
+          .cl-section-group[data-variant='contained'] > .cl-section-surface {
+            row-gap: 0 !important;
+            padding: 0 2px 2px !important;
+            border: 1px solid var(--cl-color-border-subtle) !important;
+            border-radius: calc(var(--cl-radius-xl) + 3px) !important;
+            background: var(--cl-color-background-subtle) !important;
+          }
+          .cl-section-group > .cl-section-title,
+          .cl-section-group > :has(> .cl-section-title),
+          .cl-section-header {
+            margin: 0 !important;
+            padding: 0.625rem calc(1rem + 3px) !important;
+            border: none !important;
+          }
+          .cl-section-group:has(.cl-section-actions > .cl-button[data-color='negative']) {
+            border-color: transparent !important;
+            background: var(--cl-color-negative-subtle) !important;
+          }
+          .cl-section-group:has(.cl-section-actions > .cl-button[data-color='negative']) > .cl-section-title {
+            color: var(--cl-color-negative) !important;
+          }
+          .cl-section-header .cl-section-label {
+            font-family: var(--cl-font-family-sans) !important;
+            font-size: var(--cl-text-base-size) !important;
+            font-weight: var(--cl-font-semibold) !important;
+            line-height: var(--cl-text-base-leading) !important;
+          }
+          .cl-section-header .cl-button {
+            padding: 0 !important;
+            border: none !important;
+            background: none !important;
+          }
+          .cl-section-items {
+            border: 1px solid var(--cl-color-border) !important;
+            border-radius: var(--cl-radius-xl) !important;
+            background: var(--cl-color-background) !important;
+          }
+          .cl-section-group:not([data-variant='contained']) > .cl-section-surface > .cl-section-row {
+            margin-inline: 0 !important;
+            padding-inline: calc(var(--cl-spacing) * 4) !important;
+          }
+          .cl-section-items {
+            padding-inline: 0 !important;
+          }
+          .cl-section-items > .cl-section-item {
+            padding-inline: calc(var(--cl-spacing) * 4) !important;
+          }
+          .cl-section-items .cl-section-item {
+            min-height: var(--cl-section-row-min-height) !important;
+          }
+        }
+      `}</style>
+      <UserProfileView
+        activePage={activePage}
+        pages={pages}
+        onPageChange={setActivePage}
+        elevation='flush'
+      />
+    </>
+  );
+}